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NASAL CAVITY

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NASAL CAVITY

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NASAL CAVITY

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  1. NASAL CAVITY

  2. Skeletal Framework • Parts: Alae. Dorsum. Bridge. • Skeletal components: Nasal bones. Frontal process of maxillary. Nasal part of frontal bone.

  3. Skeletal Framework • Cartilages: Septal. Lateral. Alar.

  4. Mucous Membranes • Sensory innervation: Anterior ethmoidal nerves. Nasopalatine nerves.

  5. Mucous Membranes • Motor: Parasympathetics: Via CN VII. To: Pterygopalatine ganglion. To: Mucous glands: Via branches of maxillary nerve.

  6. Mucous Membranes • Motor: Sympathetics: To: Blood vessels. From: Superior cervical ganglion. Via: Maxillary nerve.

  7. Paranasal Sinuses • Maxillary: Largest. Present at birth. Opens to: Middle meatus. Via semilunar hiatus. Nerve supply: Superior alveolar nerve. Infraorbital nerves.

  8. Paranasal Sinuses • Frontal: Paired. Opens to: Middle meatus. Via frontonasal duct. Nerve supply: Supratrochlear nerves. Supraorbital nerves.

  9. Paranasal Sinuses • Sphenoidal: Paired. Opens to: Nasal cavity. Via sphenoethmoidal recess. Nerve supply: Maxillary nerves. Ethmoidal nerves.

  10. Paranasal Sinuses • Ethmoidal: Group of ethmoidal air cells. Anterior and middle cells: Open into middle meatus. Posterior air cells: Open into superior meatus.

  11. Nasopharynx • From base of skull to soft palate. • Pharyngeal tonsils: Embedded in posterior wall. Enlarged = adenoids.

  12. Nasopharynx • Salpingopharyngeal fold (muscle): Created by named muscle. Muscle extends from auditory tube cartilage to palatopharyngeus muscle. • Opening for: Eustachian tube. Torus tubarius.